In this article, a multi-input multi-output sliding mode control methodology with constant switching frequency for single-phase quasi-Z-source inverters (qZSI) is proposed. The mathematical model of the entire system is derived in state-space form. The proposed sliding mode control is capable of controlling both dc and ac sides of the system concurrently. Unlike the existing methods, the proposed control does not require proportional-integral controller in the dc-side. Furthermore, it offers several advantages, such as simple implementation, reduced gain requirement, robustness against system parameters, and zero steady-state error in the load voltage. The fixed switching frequency is attained by altering the sliding manifold behavior inside a boundary layer. The power balance equation is used to generate the dc-side inductor current reference. The feasibility of the proposed control method is investigated experimentally when qZSI feeds linear and nonlinear loads.

中文翻译：

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用于单相准 Z 源逆变器的基于多输入多输出的滑模控制器

在本文中，提出了一种用于单相准 Z 源逆变器 (qZSI) 的具有恒定开关频率的多输入多输出滑模控制方法。整个系统的数学模型是以状态空间的形式推导出来的。建议的滑模控制能够同时控制系统的直流侧和交流侧。与现有方法不同，所提出的控制不需要直流侧的比例积分控制器。此外，它还具有多种优势，例如简单的实现、降低的增益要求、对系统参数的稳健性以及负载电压的零稳态误差。通过改变边界层内的滑动流形行为来获得固定的开关频率。功率平衡方程用于生成直流侧电感器电流参考。